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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | 1x 1x 1x 1x 3x 3x 3x 1x 1x 4x 4x 1x 2x 2x 5x 5x 5x | import crypto, { randomBytes } from "crypto";
const ALGORITHM = "sha256";
const DELIMITER = "#";
export class HashValue {
salt: string;
hash: string;
static makeFromPlainText(plainText: string): HashValue {
const salt = randomBytes(16).toString("hex");
const hash = createHash(plainText, salt);
return new HashValue(salt, hash);
}
static makeFromSerializedText(serializedText: string): HashValue {
const splited = serializedText.split(DELIMITER);
return new HashValue(splited[0] || "", splited[1] || "");
}
constructor(salt: string, hash: string) {
this.salt = salt;
this.hash = hash;
}
serialize(): string {
return this.salt + DELIMITER + this.hash;
}
isMatch(plainText: string): boolean {
const hash = createHash(plainText, this.salt);
return this.hash === hash;
}
}
function createHash(plainText: string, salt: string): string {
const hash = crypto.createHash(ALGORITHM);
hash.update(salt + plainText);
return hash.digest("hex");
}
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